Valve gear



July 8, 1930, I w. 5. BROWN 1,779,296

VALVE GEAR Filed No 5, 1928 2 sheets sheet l Jig].

NVENTOR M71742); ShermmrBrpawr ATTORNEY July 8, 1930.

w. 5. BROWN 1,770,296

VALVE GEAR 2 Sheets-Sheet 2- Filed Nov. 1928 M'l/zkmSfiermanBmw INVENTOR ATTORNEY v Patented July 8 it v witLInr/r SHERMAN BROWN"; or KNOXVILLE, TENNESSEE, 'assronoia drone-nouns BACK TO K. w. DENNIsann 0. B. KEISTER'BOTH or KNOXVILLE, TENNESSEE VALVE GEAR I Application fi1ed' November 5. 1928. serial-No. 317,273.

This invention relates to 'valve gears for locomotives andthe like, the general object.

of the invention being to; provide means for giving the valve a quick movementat the beginning and end ofthe pistonstroke and a slow movement of the valve when the-same is in open position, whereby the full power of the steam is utilized on the piston so that the engine is operated with theinaximum 16 efficiency. a 1

Another object ofthe invention is to make the gear mechanism on one side o f the locomotive entirely independent of'the mechanism on the other side whereby if any part; j -ot one mechanism should be damaged, the

other mechanism. would continue to operate andthe construction of the mechanism is such that the use'of ieccentric mechanlsm' 1s elimmated. I: 2O

er -features of construction and in'the com-' bination and arrangement of the severalparts, to be hereinafter fullydescribed, illustrated in the accompanying drawings and specifically pointed out in the appended claims;

In describing the invention in detail, refl eren'ce will be had tothe accompanying draw lngs' wherein like characters denote like or corresponding parts throughout the several views, and in whichz-e Figure 1 is a dagrammatic side view showthe mechanismat one side of a locomo- 7 v I limbs of the hanger, the (iXtlemltleS Of these in g' tive. o l v Figure 2 is a perspective View of the memher which is connected withthe main rod of the locomotive.

away: showing the link, the hanger'iand a v part of the bracket for the hanger;

arms and trunnions and showing-a part 'of' 9 mechanism to the valve.

' This invention also consists in certain 0th-* Fi ure 3 is a front view withparts' broken F'gu'e 4 is a plan View of the link with its In these views, A indicates a 'member formed with anoffs'et end 1 which is bolted to the main rod 2 of the locomotive and this tral part 3 which forms a rectangular opening connects. the front end of the main rod 2 to member A is formed with a rectangular cen-;:.

thecross head 5; The frontend of the memberA extends a considerable'distance in front 5 c0 pivoted to 'a vertically arrangedilever 16, the V V l of the pivot pin, as shown, and this end is upper end of which is formed With a slotted rectangular part7. Anarm 8-i spivoted to-: a bracketl) fastened to the cylinder .10 of the i locomotive and the other endof this arm is forthe lever 6. r

pivoted to the lever 6 immediately below'the part 7.- This arm 8 forms a movablefulcrum Asubstantially U-shaped'hanger 11 is piv v otally supported at itsupper ends to a'pairx of ears carried by a bracket 12',the base part. .of'which is slotted and bolted to apart -13 of the locomotive. This hanger is connected by a link 14 with the lever 6 a slight distance below the fulcrum point of; 'saidlever. 'A

slotted link 15 of arcuate shaper'is provided limbs forming the'trunnions18 which engage the bearing'holes in the ears of the bracket 12. The trunnions 17 are spaced'from the link 15 so that the block 19, which is'slidably mounted in the slot ofthe link, can move from one end of the slot to the other without interference from the arms or their trunnions i v I v 1 The front ends of the arms are pivoted to a block 20'which is slidably mounted in the slot in the part 7 of lever 6 and the block 19 is pivotedto the forked end'of' a'lever 2l', the,

other end-of which is pivoted to'the-outer part of'a'hanger22 supported by a bracket 23 attachedto a .part ofthe locomotiveand the inner part of the hanger has pivoted thereto an end of a rod 24 which is keyed to the stem 25 of the valve 26, as shown at 27. The hanger 22 is of the shape shown in Fig ure 6, so that the rod 24 is spaced inwardly from the member 21 and said rod passes.

through the slot in the base of the bracket 12. A link 28 connects the forward part of the member 21 with the bell crank 29 which in turn is connected by a link 30 with the reversing lever 31 of the locomotive. V

From the foregoing it will be seen that the movement of the main rod 2 is communiated to the hanger 11 andlink 15 through the lever 6 and its connections with these parts 11 and 15 and this movement of said parts 11 and 15 acts to reciprocate the valve 26 through the rod 24 through means of the member 21 and the hanger 22 and the extent of movement imparted: to the valve and the parts 21 and 24 can be regulated from. the lever 31 by changing the position of the block 19 in the link 15. Of course, it will be understood that the locomotive can be reversed by moving the block 19. into the upper part of the link 15.

By properly arranging the fulcrum member 8 in relation to the lever 6, angularity of said lever will be taken care of on extreme forward and backward movement of the cross head of the engine. As will be seen, the entirevalve gear is outside of the vertical plane of-the cross head and abovethe member A, but the valve rod 24 is arranged between the valve mechanism and the side of the locomothis so. that. it will be in alignment with the valve and its, stem.

It will, of course, be understood that the mechanism at one side of the locomotive is the sameasthat on the opposite side. fore stated, this improved valve gear will: increase the efficiency of the locomotive as it will give the valve a quick movement at the ends of the piston stroke and will retard the movement of the, valve when the inlet port is opened so that the piston will receive the full: effect of the steam pressure. It will also be seen that the mechanism at one side of the locomotive is entirely independent of the mechanism, on the other side and the use of eccentric mechanism is eliminated. V 1

7 It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes maybe made in the construction and in thecombina tion and arrangement of the several parts, provided with such changes fall within the scope of= the appended claims.

What I claim is 1,. A valve gear for a locomotive comprising a support, a hanger pivoted thereto, a link pivotally supported by the hanger, a bracket, a hanger pivotally supported thereby, means for connecting the second hanger withthe valve, ablock in the link, a member As he having one end connected with the block and its other end connected with the second hanger, a lever, a movable fulcrum for the same, means for connecting the lever with the main rod of the locomotive, means for communieating the movement of the lever to the link and the first hanger and means for manually adjusting the block in the link.

2. A valve gear for a locomotive compris ing an upright lever, a movable fulcrum for the same, means for connecting the lower end of the lever with the front end of the main rod of the locomotive, a bracket supported on a part of the locomotive, a hanger pivotally connected with the bracket, a link connecting the lower end of the hanger with the lever below the fulcrum point thereof, a slotted link pivotally supported in the hanger and having a forwardly extending part, means for slidably and pivotally connecting the said part with the upper end of the lever, a block in the slotted link, a second bracket, a hanger pivoted therein, a member pivoted at one end to the second hanger and having its other end pivoted to the block, means for moving said member and block by the reversing lever and a rod connected with the second hanger and with the stem of the valve.

3. A valve gear for a locomotive comprising a member attached to the front end of the main rod of the locomotive, an upright lever having its lower end pivoted to the front end of said member, a movable ful-' crum for the upper part of the lever, the upper end of the lever above the fulcrum having a slotted enlargement, a bracket connected with a part of the locomotive, a hanger pivoted to the bracket, a link connecting the lower end of the hanger with the lever below the fulcrum point thereof, a slotted link having its intermediate portion pivoted in the hanger, forwardly extending arms connected with an intermediate portion of the slotted link, a block in the slot of the enlargement of the lever to which the arms are pivote d, a block in the slot of the link, a lever having its front end pivoted to the block, a second bracket, a hanger pivoted thereto, said last mentioned lever being pivoted to the lower end of the hanger, a rod pivoted to the hanger and connected with the stem of the valve and means for connecting the forward part of the second lever with the reversing lever of the locomotive.

4. A valve gear for .a locomotive comprising a bracket fastenedto a cylinder of a locomotive, a fulcrum member pivoted to the bracket, a vertically arranged lever pivoted to the fulcrum member adjacent the upper end of the lever, said upper end of the lever having an.enlargement provided with a horizontal slot, a member connected with the forward end of the main rod of the locomotive and pivoted to the lower end of the lever,

said member having an opening therein for engaging a part on the pin which pivots the main rod to the cross head,-a bracket attacht ed to a part of the locomotive, a hanger. pivoted to the bracket, a link connecting the, lower end of thehanger with the lever'below the fulcrumpoint of the lever, a slot ted link pivoted inthe hanger and having a forwardly extending'part, a block pivoted I to the said part and slidably mounted in the 7 WILLIAM SHERMAN B horizontal slot of the lever, a block in the slot of the link, a second bracket, a hanger pivotally supported thereby, a member connecting'the lower end of the hanger with 15 the block, a rod connecting the lower end of the hanger with the stem of the valve, said member being connected with the outer side of'the hanger and the rod being connected 'with the inner side thereof and means for g connecting the forward part of said member with the reversinglever of the locomotive whereby said member and blockcan be adjusted in relation to the slotted'link.

In testimony whereof I affix my si nature.

R WN. 

